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US 3,943,834 AGranted
Apparatus for folding and flat-sealing the bottom of a liquid-proof package
AssigneeJagenberg Werke AG
InventorWilhelm Vetten
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AssigneeJagenberg Werke AG
InventorWilhelm Vetten
Estimating the term…
An apparatus for the folding and flat-sealing of the bottom of a liquid-proof package with a roof-shaped folded closure and inwardly folded gable walls starting with a tubular package blank, comprising a plurality of mandrels for carrying the blanks, means for advancing the mandrels progressively through a plurality of stations to be operated upon, means for folding gables on the blanks, and means for folding the roof on each blank after a gable folding operation, the means for folding the gables and the roof being positioned to operate on a blank in the course of the passage of said blank on a mandrel between two successive stations. Cams are provided so that while the operative members of the folding tools move relative to the blank in order to effect their folds, the points of initial contact between the operative members and blank are substantially maintained throughout the respective folding operation to minimize possiblity of damage to the coating with which such blanks are provided.
An apparatus for the folding and flat sealing of the bottom of a liquid-proof package with a roof-shaped folded closure and inwardly folded gable walls starting with tubular package blanks, comprising a plurality of mandrels for carrying said blanks, means for advancing said mandrels progressively through a plurality of stations to be operated upon, means for effecting gable folding on said blanks, and means for effecting roof folding on each blank after a gable folding operation, said gable folding means and said roof folding means being positioned to operate on a blank in the course of the passage of said blank on a mandrel between two successive stations and each of said gable folding means and said roof folding means including blank contracting means and cam means controlling each of said blank contacting means, each cam means being shaped so that its respective blank contacting means after initially contacting a blank moves with said blank between said two successive stations and remains in contact therewith at the initially contacted location until said blank contacting means has completed its operation on said blank.
Dependencies are inferred from the claim text.